Section 3 − Installation; Specifications; Duty Cycle And Overheating - Miller Electric Spectrum 3080 Owner's Manual

3-1. Specifications

Amperes Input at
Rated Load
Output 60 Hz
230 V
Single-
63
Phase
3-Phase 35

3-2. Duty Cycle And Overheating

Three-Phase Input Power:
60% Duty Cycle
6 Minutes Cutting
Overheating
SECTION 3 − INSTALLATION
460 V KVA KW
−− 14.6 13.9
18 14.1 13.4
4 Minutes Resting
Minutes
Rated Type of
Output Output Output Output
80 A @ 140
Volts DC,
(204 L/min)
Direct
40% Duty
Current,
Cycle
Straight Straight
80 A @ 140
Polarity
Volts DC,
(DCEN)
60% Duty
Cycle
Single-Phase Input Power:
4 Minutes Cutting
0
15
Reduce Duty Cycle
Rated
Plasma
Cutting Open-Circuit
Gas Gas
Capacity Capacity
7.2 CFM
At 80 PSI 7/8 in
(552 kPa) (552 kPa)
(22 mm) (22 mm)
Air Or
At 10 IPM
Nitrogen
Only
Duty Cycle is percentage of 10 min-
utes that unit can cut at rated load
without overheating.
If unit overheats, thermostat(s)
opens, output stops, and cooling
fan runs. Wait fifteen minutes for
unit to cool. Reduce amperage or
duty cycle before cutting.
Y Exceeding duty cycle can
damage unit and void war-
ranty.
40% Duty Cycle
6 Minutes Resting
A
OR
OM-2225 Page 9
Maximum
Voltage DC Voltage DC
350 350
duty1 4/95